To create an expert pre-sale link, you first need to find the creation option under the product column in the Douyin store background, and select the product category you want to create according to the prompts.

Next, fill in the basic information of the product, such as title, recommendation, category attributes, etc.

Then, in the "Service and Qualification" section, set key information such as shipping costs and pre-sale time.

Finally, submit for review, and after the review is passed, the pre-sale link can be officially launched. Please note that the setting of the pre-sale link needs to follow the platform regulations to ensure the accuracy and completeness of the information.